It's just one poop joke after another. I swear I didn't plan this.

Anyway, while the 4th panel is (also) a (continuation) of a joke, I have recently learned that yes, climbing a tree is one of the advices given when you're dealing with an angry moose (as you can't outrun them), with the drawback being that the moose will indeed wait for quite a while before leaving. I did not know that coming up with the idea. So I guess things that seem funny can actually be logical as well :)